Method for removing heavy metals in hazardous waste incineration fly ash through nanometer zero-valent iron

The invention discloses a method for removing heavy metals in hazardous waste incineration fly ash through nanometer zero-valent iron and belongs to the technical field of hazardous solid waste pollution in environmental protection. According to the technical scheme, the method is characterized in that the hazardous waste incineration fly and water are evenly mixed, then the nanometer zero-valent iron is added in the mixture, and a mixed solution is obtained; glacial acetic acid is used for adjusting the pH of the mixed solution to be 2-4, a vibration reaction is conducted on the mixed solution for 1-8 h at the temperature of 25 DEG C, and the heavy metals in the hazardous waste incineration fly are removed; and a heavy metal mixture of fly ash residues and the nanometer zero-valent iron is separated out from the mixed solution after the reaction through magnetic separation, and then the heavy metal mixture of the nanometer zero-valent iron is recycled. The reaction time for the nanometer zero-valent iron to remove the heavy metals in the incineration fly ash is short, and the removal effect is good; and the leaching toxicity of the heavy metals obtained after treatment on the hazardous waste incineration fly is obviously reduced, and resource utilization of the incineration fly ash residues is better facilitated.